Breathable, protective, and hella stylish summarize the Alliance SS. To promote ventilation, the SS is equipped with dorsal aspect supervents that duct fresh air into the helmet. To complete the flow dynamics, strategically placed exhaust vents evacuate the heat buildup. A resilient engineered polycarbonate shell, coupled with a dual-density styrene liner, combine to meet or exceed both DOT and Snell standards. Fully removable cheekpads, comfortable Nylex lining, and dimensionally molded crown pad complete the interior. Quality, fit, and value that far exceed the price. Meets all DOT and Snell standards